Here, I made 2 columns y
and delta
y=matrix(c(1,1,1,0,0,0,1,0),nrow=8)
delta=matrix(c(1,0,0,0,1,0,0,0),nrow=8)
What I want to do now is make new y
. I want to treat delta
as an indicator for missing values of y
. If delta
is 1, I will treat y
as observed. If delta
is 0, I will treat y
as missing. So the expected output for y
should be
y=matrix(c(1,NA,NA,NA,0,NA,NA,NA),nrow=8)
We could use convert the 0 elements in delta to NA
and multiply by y
(NA^!delta) * y
-output
[,1]
[1,] 1
[2,] NA
[3,] NA
[4,] NA
[5,] 0
[6,] NA
[7,] NA
[8,] NA
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